Steam-boiler furnace.



gm. 729,589. .PATENTBD JUNE 2, 1903.

E; R. R; HOYT. STEAM BOILER FURNACE. APPLIOA'I'ION PIL'ED JUNE 30. 1992.

N0 MODEL.

F f z y witmsshs: I mwmq'n mormgv;

UNITED STATES.

Patented June 2,1903.

PATENT OFFICE.

ENOCl-l RENSLO'W ROLFE'HOYT, OF lHlLADElIPIllA, PENNSYLVANIA.

STEAM-BOlLER FURNACE.

S FIGATIQN forming part of Letters Patent No. 729,589, dated une 1 903.

Application filed June 30, 1902. Serial No. 113,725. (No model.)

To all 2072,0712 it may concern: V

Be it known that LENocH Rnusnow ROLFE HOYT, a citizen of the United States, and a resident of Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented certain new and. useful Improvements in Steam-Boiler Furnaces, of Whichthe following is a specification, reference being had to r the accompanying drawings, forminga part steam-resin-re thereof, in which similar letters of reference indicate corresponding parts.

This invention relates to steamboiler furnaces, the object thereof being to provide an improved structure of this character adapted to promote perfect or approximately perfect combustion and prevent smoke or reduce its volume to a minimum, and which is so con structed as to supply heated air to the f or n'ace to insure uniformity of temperature of the air admitted thereto for purposes of supplying the oxygen necessary for combustion of the fuel employed,aud in which the'carbou produced by combustion is combined with the heated oxygen to generate carbon dioxid or carbonic acid, whereby combustion of the fuel is accelerated.

The device is simple in construction, economical and generally eiiicient in operation, and it is adapted. to burn any common fuel and is especially applicable for practicably consuming bituminous or other soft smokeproducing coal. k

The invention. will be hereinafter fully de scribed, and specifically set forth in the annexed claims. p

In the accompanying drawings; forming part of this specification, Figure l is alongitudinal sectional elevation. of a boiler and furnace having my improvements forming part thereof. Fig. 2 is a detail sectional plan view taken in the line a: m of Fig. 1, and Fig.

3 is a detail vertical sectional elevation taken.

on the line 3 y of Fig. 1.

In the practice of my invention I may employin connection with my improvements any common and Well-known furnace and boiler structure. For purposes of illustration 1 have show-n in the drawings a furnace A, having i s of ordinary construction and containii crate B, Water-reservoir G,

and mud-drum D.

The bridge he furnace is o3? novel cone strnction and embodies the two walls 6 e, having the compartment F'between them, the front wall 2" having the passage or fine E for inlet of air below the grate. The top of this compartment is closed by means of the removable plate G, which has an opening 9 for outlet of heated air to be supplied to the fur pace, as will be hereinafter fully described. Within and extended laterally across the compartment F and embedded in the side walls of the furnace'I place a plurality of vertical partitions H H... These partitions are preferably equidistant and parallel with each other, and they preferably embody flat plates composed of any suitable material adapted to Withstand the action of heatjbut I do not confine myself to their specific surface con-' tour nor arrangement, as they might be ar ranged in positions other than vertical. The plates H each extend to apoiut near the bottom of the compartment F andare respectively tightly fitted to the cover G to form an air-tight joint, and the plates H respectively extend from a tight joint at the bottom to a point near the top of. the compartment. Thus a zigzag or tortuous channel is provided which admits the air which enters through the flue E to be heated during its winding. course through the compartment F.

In the operationand use of the invention. atmospheric air or any other medium adapt ed to assist combustion is introduced through the channel-E to the compartment F, and the draft causes the air to pass alternately in a downward and upward direction through the tortuous channel formed by the plates H H until it is finally discharged through the outlet-opening g into the furnace proper, heated to a uniformly high temperature owing to its slow tortuous course through the compartment F. Having entered the furnace with its'ten perature nnitormly raised, the said medium. readily combines with the carbon or other combustible elements thrown oil by the fuel, thus promoting combustion and pre venting smoke.

I do not confine myself 'to the specific details of construction and contour of the parts as herein shownand described, as it is obvious that under the scope of my invention I am entitled. to slightstructural variations.

Having thus described my invention, What ICC I claim as new, and desire to secure by Letters Patent, is-

1. In a steam-generator furnace, the combination with a bridge-wall, located beneath the grate of said furnace, and having a compartment therein, and having its forward wall pierced with an air-inlet, of parallel vertical plates embedded in the walls of said compartment and arranged to form a tortuous passage in said compartment, whereby the media to be heated and supplied to the furnace is first conducted downward, then upward, and so alternately downward and upward, until it passes into the combustionchamber of the furnace, and a removable plate formed with an opening for the'passage of media from said compartment into the said combustion-chamber, resting on and closing the top of said compartment.

2. In a steam-generator, the combination with a water-reservoir O, a furnace A, and a bridge E, formed with the compartment F, and the inlet E, in the middle of the forward wall thereof, of the vertical plates H and H, embedded in the walls of said compartment, extending within said compartment, arranged to conduct media to said furnace through a tortuous channel, and to heat the same, while being so conducted, and a removableplate G, covering said compartment and constructedwith the outlet g, through which said media, after being conducted through the said tor-. tuous passagein said compartment, passes into the combustion-chamber of said furnace.

, In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 24th day of'April, A. D. 1902.

ENOCH RENSLOW ROLFE HON.- Witnesses:

Mrs. ROBERT J. VASSEUR, SAMUEL C. KANE. 

